<template>
  <div>
    <div>
      <span>姓名:</span>
      <input type="text" v-model="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="sex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="add">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in list" :key="index">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.sex }}</td>
          <td>
            <button @click="del(item.id)">删除</button>
            <button @click="edit(item.id)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      flag: false,
      id: '',
      name: '',
      age: '',
      sex: '',
      list: [
        {
          id: +new Date(),
          name: '张三',
          age: 25,
          sex: '男'
        }
      ]
    }
  },
  methods: {
    add () {
      if (this.name === '' || this.age === '' || this.sex === '')
        return alert('数据不能为空')
      // 如果flag为true说明点击了编辑按钮那么需要做的操作是进行修改
      if (this.flag) {
        this.list.find(item => (item.id = this.id)).name = this.name
        this.list.find(item => (item.id = this.id)).age = this.age
        this.list.find(item => (item.id = this.id)).sex = this.sex
        this.flag = false
        this.name = ''
        this.age = ''
        this.sex = ''
        return
      }
      this.list.push({
        id: +new Date(),
        name: this.name,
        age: this.age,
        sex: this.sex
      })
      this.name = ''
      this.age = ''
      this.sex = ''
    },
    del (id) {
      this.list = this.list.filter(item => item.id !== id)
    },
    edit (id) {
      this.flag = true
      this.id = id
      this.name = this.list.find(item => (item.id = id)).name
      this.age = this.list.find(item => (item.id = id)).age
      this.sex = this.list.find(item => (item.id = id)).sex
    }
  }
}
</script>

<style></style>
